A patch of sky dark enough to be protected

Drive out to the tip of the Thumb on a clear, moonless night and the sky does something most of Michigan’s lower half can’t show you anymore: it fills up. The Milky Way comes out as an actual band of light, not a rumor. That’s the whole point of Port Crescent State Park’s dark sky preserve, set along three miles of Lake Huron shore a few miles southwest of Port Austin.

The state named it a dark sky preserve in 2012, one of a small handful around Michigan where the DNR works to keep artificial light down so the stars stay visible. Geography helps. The park sits at the end of a long, thinly settled peninsula, with the black emptiness of Saginaw Bay on one side and Lake Huron on the other — no big city glow for a long way in any direction.

The designated spot is back near Parking Lot D, where there’s a viewing platform built out away from headlights and lot lamps. You hike in from the lot, which keeps stray light to a minimum, and the park doesn’t plow that stretch in winter, so on cold clear nights it’s about as dark and quiet as the Lower Peninsula gets.

It pairs strangely well with what’s underfoot. This same park sits on top of a vanished lumber town, Port Crescent, whose old sawmill chimney still stands among the campsites. So you can spend the day walking dunes over a buried 1800s boomtown and the night under a sky that looks the way it did before that town ever lit a lamp. Bring a blanket, let your eyes adjust for a good twenty minutes, and look up.